Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS4992048 A
Publication typeGrant
Application numberUS 07/342,652
Publication dateFeb 12, 1991
Filing dateApr 24, 1989
Priority dateApr 15, 1985
Fee statusLapsed
Also published asDE3684396D1, EP0217890A1, EP0217890B1, WO1986005967A1
Publication number07342652, 342652, US 4992048 A, US 4992048A, US-A-4992048, US4992048 A, US4992048A
InventorsSven K. L. Goof
Original AssigneeGoof Sven Karl Lennart
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Endodontic
US 4992048 A
Abstract
A broaching tool has a needle-shaped working portion (2) and a shank portion which is shaped for attachment in the distal end (18) of a drive bar (12) of a drive instrument for the tool. The shank portion of the tool has at least one bend (8) and preferably also a second oppositely directed bend (10). A proximal end (14) of the drive bar (12) of the drive instrument is adapted to be coupled to a vibratory element (16) which, thereby, is able to generate longitudinal high frequency vibrations in the drive bar (12). The distal drive bar end (18) is angled (B) about an axis (22) which acts as a hinge having a certain rigidity of bending. By adapting and matching a. o. the angle (B) and the bends (8, 10) in the tool, it is possible to compensate away distructive natural oscillations in the tool which, thereby, can be powered and used with high working frequencies without risk of fatigue fractures in the material of the tool.
Images(2)
Previous page
Next page
Claims(6)
I claim:
1. An endodontic tool for directing ultrasonic vibrations in connection with cleansing and preparation of tooth root canals; said tool comprising a generally straight and needle-shaped working portion and a shank portion for mounting and firmly securing in a drive instrument of the type adapted to be operatively coupled to an ultrasonic vibratory handpiece, characterized by said shank portion including two oppositely directed bends with parallel axes of bending, said bends being selected to provide a configuration for transforming and directing ultrasonic vibrations from said handpiece and drive instrument into the direction of a longitudinal axis of said generally straight working portion.
2. An endodontic tool in accordance with claim 1, further comprising a drive instrument comprising a generally bar-shaped drive member having a proximal end portion which is adapted to be operatively coupled to an ultrasonic vibratory handpiece in order to be powered thereby to make longitudinal mechanical vibrations, and a distal end portion which is adapted and shaped as a head portion with means for removably mounting and firmly clamping a shank end of said endodontic tool, said head portion being designed to perform a particular pattern of oscillations including components of oscillation with a main direction which is transverse to said longitudinal vibrations, characterized by said head portion being defined by an angled distal end portion of said generally bar-shaped drive member, the angle of said distal end portion being matched to said bends of said shank portion in order to compensate away resonances in the tool.
3. A drive instrument in accordance with claim 1, characterized in that said generally bar-shaped drive member has a local reduction of thickness at the area of bending thereof.
4. An endodontic tool in accordance with claim 1, characterized by each of said two oppositely directed bends defining acute angle.
5. An endodontic tool in accordance with claim 1, characterized by each of said two oppositely directed bends defining an obtuse angle.
6. In combination, a drive instrument comprising a generally bar-shaped drive member having a proximal end portion adapted to be operatively coupled to an ultrasonic vibratory handpiece in order to be powered thereby to make longitudinal mechanical vibrations and having a head portion defined by an angled distal end portion of said generally bar-shaped drive member, said head portion performing a predetermined pattern of oscillations, including components of oscillation with a main direction transverse to said longitudinal vibrations, when said instrument is in operation, and an endodontic tool having a shank portion mounted upon and firmly secured to said head portion and a straight, needle-shaped working portion, said shank portion including two oppositely-directed bends with parallel axes of bending, said bends being selected to provide a configuration for transferring and directing ultrasonic vibrations from said drive instrument into the direction of a longitudinal axis of said straight working portion.
Description

This application is a continuation-in-part, of application Ser. No. 004,437 filed Dec. 9, 1986, now abandoned.

The present invention relates to a file or broaching tool, in particular for use in cleansing and preparation of tooth root canals and otherwise of the type defined in the opening clause of claim 1. Furthermore, this invention relates to a drive element adapted to drive such a tool and being of the type defined in the opening clause of claim 4.

In connection with root-treatment of a tooth it is important that root canals in the tooth are cleansed effectively. In that connection it is common practice to use a relatively thin round file or broach which is inserted into the root canal and is pulled back and forth therein, while the dentist grasps and manipulates one end or a handle portion of the file with his fingers. For the dentist this is a difficult operation which also may be rather unpleasant for the dentist as well as for the patient, in particular when teeth are to be treated far back in the patient's mouth, since the dentist has to operate with several fingers inserted completely into the patient's mouth in order to use and manipulate the file.

Therefore attempts have been made to mount such a broach or endodontic file at the end of a drive element or drive member of the type which is adapted to be powered by an ultrasonic handpiece of the sorts which are in common use in many dental clinics. Such handpieces include an elongated and relatively slim housing which is used held as a pencil, and the outer end of the housing is adapted for mounting replacable work tools thereon, for instance tools for tooth scaling. The drive member of such work tools is powered to make mechanical and ultrasonic longitudinal vibrations by means of vibratory equipment in the interior of the housing.

Inherently, the ideal pattern of motion for a needle-shaped work tool of the type in question would be a reciprocating movement whereby the tool, or at least its working part, is integrally moved in a generally axial motion. Therefore it would be natural to mount the work tool or needle as a direct extension of the bar-shaped drive stem of the drive member. This would, however, result in that it would be almost impossible to use the needle in the patient's mouth when the ultrasonic handpiece is held and manipulated in the usual manner, i.e. held as a pencil.

Thus, for practical reasons the axis of the needle or its working direction cannot coincide with the principle direction of motion for the powering mechanical vibrations which are generated by the ultrasonic handpiece and are transferred to the needle through the drive instrument for the needle. Consequently, the powering vibrations will provide substantial transversal oscillations in the needle. As a consequence, it has been necessary to use frequencies of movement which are substantially below the resonant frequencies of the needle since, otherwise, these resonant frequencies would be excited and result in transversal natural oscillations in the needle. Typically, such natural oscillations will be undamped and will, consequently, be very unfortunate and straining for the material of the needle which, after a rather short period of use, will break because of fatique fractures in the material. This has been a problem in connection with previous attempts of mounting and powering a root canal file or broach needle by means of a drive instrument and an ultrasonic handpiece of the type mentioned above.

When a needle is operating in a tooth root canal, it would be an advantage--a.o. of less discomfort to the patient--if the amplitude of motion of the needle is as small as possible. However, the amplitude is inversely proportional to the frequency of motion and when a given amount of work is to be made within a specific period of time, then the desire as to a small amplitude will lead to a need of a frequency as high as possible and, again, this would result in risks of fractures in the needle.

In a commercially available instrument of the type in question a straight needle or root canal file is removably mounted as an axial extension of a bar-shaped drive member and in order to achieve an appropriate working position for the needle, the drive member is shaped with a bend which directs the needle in an appropriate direction relative to the main axis of the instrument. However, the bend of the drive member will provide or give rise to substantial transversal oscillations in the needle and, consequently, it is only possible to operate at relatively low frequencies, if needle breakage is to be avoided. Moreover, the manner of mounting the needle makes it necessary to use a particular collect chuck at the end of the drive member in order to avoid that the needle comes loose during use.

Another commercially available instrument of the type under consideration makes use of a straight needle or root canal file which is attached in a particular head portion at the outermost end of a bar-shaped drive member. The head portion is designed as an unsymmetrical body relative to the longitudinal axis or the axis of oscillation of the drive member. As a result of the lacking symmetry this head portion will perform a pattern of oscillation which includes special components of vibration having a main direction which is transverse to the powering longitudinal oscillations in the drive member. The straight needle is attached to the head portion and is directed in the direction of these special components of vibration. However, such a head portion is awkward to use in the patient's mouth and, moreover, inappropriate or destructive transversal oscillations will still be provided in the needle.

On the above background it is an object of this invention to provide a tool of the type introductorily defined which can be powered to operate with high frequencies without the risk of destructive oscillations being excited in the tool.

This is accomplished with the tool of the present invention which is characterized by the features defined in the characterizing clause of claim 1.

Thus, a tool according to the invention can advantageously be used in a drive member of an instrument of the type just mentioned in which the outer or distal end of the drive member is shaped as a head which makes special oscillations with components transverse to the main direction of the powering longitudinal vibrations. However, the best results are obtainable when using the tool of this invention in a drive instrument in accordance with the invention which is characterized by the features defined in the characterizing clause of claim 4. Thus, the angled part of the drive stem and the bending of the tool shank can be matched together in such a manner that unfortunately directed vibration components can be suppressed to a substantial extent.

In the following special aspects and advantages of the invention will be described on the basis of specific embodiments illustrated on the drawing in which:

FIG. 1 shows a tool in accordance with the invention as seen from one side;

FIG. 2 is a side elevation similar to FIG. 1 but showing a preferred embodiment of the tool of the invention;

FIG. 3 is a side elevation showing a tool as that of FIG. 2 attached into a preferred embodiment of the drive instrument in accordance with the invention; and

FIG. 4 is a side elevation showing--partially in section and enlarged--the distal end of the drive instrument of FIG. 3.

FIGS. 5 and 6 show respective further embodiments of the tool.

Referring now to the drawing, FIG. 1 thereof shows a tool according to the invention which includes a generally straight working portion 2 which merges into a shank portion 4. As schematically indicated, the working portion 2 is provided with appropriate cutting edges which may be of the type used on a usual broaching needle or endodontic file. In FIG. 1 the shank portion 4 has a bend 8 so that a shank end 6 is provided and is adapted for attachement in a drive instrument, and an axis of the shank end defines an angle with the axis of the working portion 2.

FIG. 2 illustrates a preferred embodiment which also has a further bend 10 in its shank portion 4 so that the shank portion includes two oppositely directed bends 8, 10 with parallel axes of bending. The bend 10 which is closest to the working portion 2, may advantageously be more rounded than the first bend 8. The two bends 8, 10 need not be so adapted that the axis of the shank end 6 is parallel with the axis of the working portion 2.

Referring now to FIG. 3 a drive instrument according to the invention includes a generally bar-shaped drive member 12 having a proximal end portion 14 adapted for insertion into an ultrasonic handpiece. The proximal end portion 14 includes means for coupling to the oscillator equipment of the handpiece so that longitudinal high frequency vibrations are provided in the drive member 12. In the embodiment shown these coupling means comprise a socket whereby the drive member 12 is rigidly connected with one end of a usual ferrite core indicated at 16. This core is part of the oscillator equipment and high frequency longitudinal vibrations are generated in the core by means of an alternating magnetic field provided in the handpiece.

In the embodiment shown the vibration providing core 16 is permanently connected with the socket on the end portion 14 and, accordingly, the core 16 can be regarded as being a part of the drive member 12. This is expedient but is not an absolute necessity, the main thing being that one end of the drive member 12 is quickly and easily insertable into a handpiece of the type contemplated and during the insertion can be effectively coupled together with the powering or vibratory device of the handpiece so that longitudial vibrations are provided in the drive member 12.

The drive member 12 may also include a flange 15 for use in the mounting in the handpiece. Preferably, the various components of the drive member are also so adapted that the powering longitudinal vibrations in the drive member 12 will include a nodal center at the flange 15 and a maximum of motion close by the other or distal end 18 of the drive member.

Generally considered, the distal end of the drive member 12 is designed as a separate oscillating body with a center of gravity which is offset relative to the longitudinal axis or the axis of vibration for the drive member 12. This particular oscillating body will, accordingly, perform a separate oscillatory pattern about an axis which is indicated at 22, and these oscillations will include substantial components acting transverse to the powering longitudinal vibrations in the drive member 12.

In other words this particular oscillating body at the distal end 18 of the drive member could be regarded as a separate oscillatory system which transforms or redirects a part of the powering longitudinal vibrations in the drive member 12 into oscillations which act generally transverse to the main direction of the powering longitudinal vibrations. These redirected oscillations can be used to power a tool or a needle, and the influences thereon will include a substantially less content of transversal components compared to a corresponding tool which is attached in and powered by an entirely straight drive member with uniform cross section.

Because of the offset center of gravity, the movements at the particular body at the distal end 18 of the drive member will be elliptical in a plane defined by the longitudinal axis of the drive member and an axis which extends through the point 22 and the center of gravity for the body at the end 18. This elliptical movement can be stabilized when the nodal center at the flange 15 is fixed or retained.

If a tool of this invention as that of FIG. 1 or FIG. 2 is considered separately, and if the working portion 2 is supposed to be powered at its free end with a powering longitudinal vibration, then the angled shank end 6 would also be able to transform longitudinal vibrations in a similar manner, since also the shank end 6 has a center of gravity which is offset relative to the longitudinal axis of the working portion 2. In this situation the shank end 6 would, accordingly, also perform an elliptical movement.

By an appropriate shaping the two elliptical patterns of motion can be made to correspond to each other as regards size and shape. Simultaneously, the resonant frequencies of the two elliptical oscillations can be so adapted that they are in the same frequency area, but yet they are so different that one oscillation cannot generate the other one. Typically, this means that the resonant frequencies differ from each other by a factor in the range from 2 to 10.

When the two patterns of motion are coupled together, for instance as shown in FIG. 3, and if the two coupled systems are powered by longitudinal vibrations in the drive member 12, then the resonances in the tool will be removed or suppressed, because the tool is powered in the correct--or almost correct--pattern of motion, but with a mis-matched frequency. Consequently, the body or mass at the distal end 18 will control or drive the tool in the pattern of motion which is determined by the body and can propagate into the entire tool in the shape of oscillations with very small amplitudes, because the oscillations are not in harmony with the geometry and natural oscillations of the tool. Since the amplitudes are small the strains in the tool material are also small, and destructive oscillations are not provided in the tool material.

Accordingly, the tool of this invention can be powered with high frequency and long lifetime by means of a drive instrument of the type described above having a distal end or mass 18 with an offset center of gravity.

The drive instrument according to this invention is particular by having the distal end 18 angled about the axis 22 to angle B relative to the drive member 12, and there is no need of a specially shaped and perhaps bulky head which easily will get in the way during use of the tool in the patient's mouth. However, the length of the end portion 18 should preferably be short--for instance of the same order of magnitude as the diameter of the end portion 18.

In order to tune or match the special oscillatory system of which the end portion 18 is a part, to the powering vibratory system it is expedient to make a local reduction of the dimension of material of the drive member 12 at the area of bending about the axis 22. In the embodiment shown this reduction is made as local flattenings 24, whereby the transverse dimension of the drive member is not reduced--but is rather somewhat increased--in the direction of axis 22, i.e. at right angles to the drawings plane in FIG. 3.

Thereby, the area about the axis 22 will operate as a sort of hinge which has bigger or smaller bending rigidity according to how much the material thickness has been reduced at 24. In this manner the mass or body at the end 18 can be made to oscillate with frequencies which are lower than the generator frequency, and if the difference is sufficiently big, then the generator frequency (from core 16) will be able to maintain the oscillations in the angled drive member end 18.

Thus, there is provided a system or an equipment, whereby powering ultrasonic vibrations (as an example 42 Kh can be transmitted to and power a tool at a lower frequency) which still is very high compared to previously obtained or obtainable working frequencies in tools of the type in question. Simultaneously, compensations have been made for the tendency of the tool to perform destructive natural oscillations.

Moreover, the angled end portion 18 and the angled shank portion of the tool in accordance with the invention can be used to obtain that the working portion 2 of the tool attains an appropriate angle A relative to the longitudinal direction of the drive member 12 and of the entire handpiece.

As shown in FIG. 4 the clamping of the shank end 6 of the tool in the distal end 18 of the drive member can appropriately be accomplished by means of a transverse bore which possibly may be through-going, in the end portion 18, and an appropriately recessed screw may be used to safely secure the tool in place, as indicated at 20 in FIG. 4.

The first bend 8 of the tool shank 4 should preferably be rather close to the surface of the end portion 18, when the tool is mounted and secured therein. In addition the tool should be secured in such a position that the bending axis 22 in the drive member 12 is parallel with each bending axis in the tool of the invention.

FIGS. 5 and 6 illustrate respective further embodiments of the endodontic tool or file of the present invention. As in FIG. 2 each of these further embodiments has a shank portion 4 including a double bend which comprises a first bend 8 and a second bend 10 directed oppositely to the first bend. The axis of bending of the first bend 8 is parallel to that of the second bend 10.

The respective angles of bending depend on several factors, in particular on the diameter of the file. Moreover, the angles of bending depend on the length of the working portion 2 and on the material of which the file has been made.

The embodiment of FIG. 5 has a type of double bend which has proven to be very efficient for thinner files with a shank diameter in the order of 0.5 mm. As shown, the first bend 8 defines an acute angle B, while the second bend 10 defines an actue angle C.

The embodiment of FIG. 6 has another type of double bend which has proven to be very efficient for thicker files with a shank diameter in the order of 0.6 to 0.8 mm. In this embodiment the first bend 8 and the second bend 10 define respective obtuse angles D and E.

For the purpose of further illustration and understanding reference is made to the following examples of dimensions.

While the tool and drive instrument of this invention primarily have been developed for use in connection with root treatments of teeth, the tool of the invention has turned out to be so efficient that it is very suitable as a proper drilling tool, for instance for making very fine holes in bone tissues or other materials with similar character and hardness. A contributing reason of this is that relatively big amounts of energy (as an example 5 watts) can be transferred with equipment in accordance with the invention.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US736101 *Oct 30, 1902Aug 11, 1903Gershom B HoughDental tool.
US873100 *Jan 10, 1907Dec 10, 1907Carl A SkalstadDental broach.
US1015039 *Jan 31, 1910Jan 16, 1912Vincent LasburyDental tool.
US1168052 *Oct 17, 1914Jan 11, 1916William W BollsDental instrument.
US1356755 *Feb 18, 1920Oct 26, 1920Bolls William WDental instrument
US1369112 *Jun 17, 1920Feb 22, 1921Wm Jones TrumanDental nerve-broach
US4229168 *Aug 23, 1978Oct 21, 1980Scholz Jr Howard WContra-angle ultrasonic endodontic instrument
US4353696 *Jul 10, 1981Oct 12, 1982Bridges Byron KVibrating dental tool device and method
US4364730 *Oct 21, 1981Dec 21, 1982Axelsson Per A TPeridontal probe
US4484891 *Oct 6, 1982Nov 27, 1984Syntex (U.S.A.) Inc.Vibratory endodontic device
US4492574 *Apr 15, 1983Jan 8, 1985Cavitron, Inc.Ultrasonic endodontic dental apparatus
US4505676 *Sep 30, 1983Mar 19, 1985Dentsply Research & Development Corp.Endodontic unit
US4571183 *Aug 18, 1983Feb 18, 1986Syntex (U.S.A.) Inc.Vibratory endodontic device
SU1242151A1 * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5320530 *Dec 17, 1992Jun 14, 1994Fong Cheng DEndodontic apparatus for retrofill cavity preparation
US5407558 *Jul 22, 1991Apr 18, 1995Chevron Research And Technology CompanyDetermining catalyst life for each stage as function of change in research octane number from feed to effluent, selecting first stage effluent octane number such that lives are equal
US5642998 *Jun 6, 1996Jul 1, 1997Riitano; FrancescoEndodontic instrument for rapid mechanical widening of the canal mouth and specific rectification of the first two thirds
US5775904 *Jun 30, 1997Jul 7, 1998Ultradent Products, Inc.Endodontic instrument for rapid mechanical widening of the canal mouth and specification of the first two thirds
US5797747 *Nov 21, 1995Aug 25, 1998Micro Mega International Manufactures, S.A.Method for using endodontic instrument fitted on a vibrating hand-piece
US6042375 *Jan 28, 1998Mar 28, 2000Ultradent Products, Inc.Endodontic systems for progressively, sectionally and anatomically preparing root canals with specific instruments for each section having predetermined working lengths
US6045362 *Jan 28, 1998Apr 4, 2000Ultradent Products, Inc.Endodontic methods for progressively, sectionally and anatomically preparing root canals with specific instruments for each section having predetermined working lengths
US6059572 *Jun 3, 1999May 9, 2000Ultradent Products, Inc.Endodontic methods for the anatomical, sectional and progressive corono-apical preparation of root canals with three sets of dedicated instruments
US6231340 *Sep 29, 1997May 15, 2001Patrick M Kildea, Jr.Endodontic instrument
US6283981Apr 6, 2000Sep 4, 2001Ethicon Endo-SurgeryMethod of balancing asymmetric ultrasonic surgical blades
US6309400Jun 29, 1998Oct 30, 2001Ethicon Endo-Surgery, Inc.Curved ultrasonic blade having a trapezoidal cross section
US6312255 *Feb 4, 2000Nov 6, 2001Kenneth HudakEndodontic adapter for a sonic scaler
US6328751Feb 8, 2000Dec 11, 2001Ethicon Endo-Surgery, Inc.Balanced ultrasonic blade including a plurality of balance asymmetries
US6379155Mar 27, 2000Apr 30, 2002Ultradent Products, Inc.Endodontic systems and methods for the anatomical, sectional and progressive corono-apical preparation of root canals with instruments utilizing stops
US6390819Jan 3, 2001May 21, 2002Ultradent Products, Inc.Endodontic systems and methods for the anatomical, sectional and progressive corono-apical preparation of root canals with dedicated stainless steel instruments and dedicated nickel/titanium instruments
US6436115Sep 12, 2000Aug 20, 2002Jean M. BeaupreBalanced ultrasonic blade including a plurality of balance asymmetries
US6558163May 3, 2001May 6, 2003Ultradent Products, Inc.Endodontic systems and methods for preparing upper portions of root canals with increasingly rigid files
US6585513May 3, 2001Jul 1, 2003Ultradent Products, Inc.Endodontic systems and methods for preparing apical portions of root canals with a set of files having large tapers
US6660017May 21, 2001Dec 9, 2003Ethicon Endo-Surgery, Inc.Balanced ultrasonic blade including a singular balance asymmetry
US6746245Feb 21, 2002Jun 8, 2004Ultradent Products, Inc.Methods for cleaning and shaping asymmetrical root canals in an anatomical fashion
US6926526May 24, 2002Aug 9, 2005Kenneth G. HudakEndodontic adapter for a sonic scaler
US6942484 *May 3, 2004Sep 13, 2005Scianamblo Michael JCritical path endodontic instruments for preparing endodontic cavity spaces
US6958070Oct 18, 2001Oct 25, 2005Witt David ACurved clamp arm tissue pad attachment for use with ultrasonic surgical instruments
US6976969Jan 14, 2002Dec 20, 2005Ethicon Endo-Surgery, Inc.Blades with functional balance asymmetries for use with ultrasonic surgical instruments
US6997709Feb 14, 2001Feb 14, 2006Lm-Instruments OyDental hand instrument and tip of the instrument
US7094056Jan 22, 2004Aug 22, 2006Scianamblo Michael JEndodontic instrument having reversed helix
US7300446Jul 20, 2001Nov 27, 2007Ethicon Endo-Surgery, Inc.Curved ultrasonic end effector
US7479148Oct 28, 2005Jan 20, 2009Crescendo Technologies, LlcUltrasonic shear with asymmetrical motion
US7530986Jan 8, 2001May 12, 2009Ethicon Endo-Surgery, Inc.Laminated ultrasonic end effector
US7758600Sep 18, 2007Jul 20, 2010Ethicon Endo-Surgery, Inc.Balanced ultrasonic end effector
US7955078 *Sep 13, 2005Jun 7, 2011Scianamblo Michael JEndodontic instruments for preparing endodontic cavity spaces
US8002782Sep 23, 2005Aug 23, 2011Ethicon Endo-Surgery, Inc.Curved clamp arm tissue pad attachment for use with ultrasonic surgical instruments
US8021381Jun 23, 2010Sep 20, 2011Ethicon Endo-Surgery, Inc.Balanced ultrasonic end effector
US8241312Aug 17, 2005Aug 14, 2012Ethicon Endo-Surgery, Inc.Blades with functional balance asymmetries for use with ultrasonic surgical instruments
US8454361Apr 10, 2006Jun 4, 2013Michael J. ScianambloSwaggering endodontic instruments
US8469982Apr 7, 2011Jun 25, 2013Ethicon Endo-Surgery, Inc.Curved clamp arm for use with ultrasonic surgical instruments
US8496476 *May 20, 2011Jul 30, 2013Michael J. ScianambloEndodontic instruments for preparing endodontic cavity spaces
US8617194Sep 1, 2011Dec 31, 2013Ethicon Endo-Surgery, Inc.Balanced ultrasonic end effector
US8623040Jul 1, 2009Jan 7, 2014Alcon Research, Ltd.Phacoemulsification hook tip
US8672959Jun 21, 2013Mar 18, 2014Ethicon Endo-Surgery, Inc.Curved clamp arm for use with ultrasonic surgical instruments
US20100179654 *Mar 8, 2007Jul 15, 2010Woodwelding AgDiversion of mechanical oscillations
US20110020765 *Apr 30, 2010Jan 27, 2011Randall MaxwellUltrasonic tip for dental device
US20110217673 *May 20, 2011Sep 8, 2011Scianamblo Michael JEndodontic instruments for preparing endodontic cavity spaces
US20140113246 *Nov 17, 2012Apr 24, 2014Loma Linda UniversityMethod and devices for placing root repair materials for root-end cavities
USRE39174Apr 26, 2001Jul 11, 2006Leonard Stephen BuchananEndodontic treatment system
EP1086659A2 *Apr 28, 1995Mar 28, 2001Buchanan, Leonard StephenEndodontic treatment system
WO2004098438A1 *May 3, 2004Nov 18, 2004Michael J ScianambloCritical path endodontic instruments for preparing an endodontic cavity space
WO2005041806A1Oct 19, 2004May 12, 2005Larsen Steven SEndodontic instrument
WO2007048938A1 *Oct 27, 2006May 3, 2007De La Garanderie Emmanue PayenDevice for preparing and filling a tooth endodontic cavity
WO2007101362A2 *Mar 8, 2007Sep 13, 2007Woodwelding AgDiversion of mechanical oscillations
WO2010017024A1 *Jul 20, 2009Feb 11, 2010Alcon Research, Ltd.Offset ultrasonic hand piece
Classifications
U.S. Classification433/102, 433/119
International ClassificationA61C1/07, A61C5/02, A61C3/03
Cooperative ClassificationA61C3/03, A61C5/023
European ClassificationA61C5/02B1, A61C3/03
Legal Events
DateCodeEventDescription
Apr 25, 1995FPExpired due to failure to pay maintenance fee
Effective date: 19950215
Feb 12, 1995LAPSLapse for failure to pay maintenance fees
Sep 20, 1994REMIMaintenance fee reminder mailed